JPS6457895A - Supervisory and control system - Google Patents
Supervisory and control systemInfo
- Publication number
- JPS6457895A JPS6457895A JP21405887A JP21405887A JPS6457895A JP S6457895 A JPS6457895 A JP S6457895A JP 21405887 A JP21405887 A JP 21405887A JP 21405887 A JP21405887 A JP 21405887A JP S6457895 A JPS6457895 A JP S6457895A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- slave station
- circuit
- logic circuit
- monitor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Selective Calling Equipment (AREA)
Abstract
PURPOSE:To supervise a slave station by a master station at all times by using a control signal and a maintenance telephone signal applying the control of the processing operation of the slave station to use one frequency band in common. CONSTITUTION:A maintenance telephone circuit 4 is connected to a maintenance telephone circuit 24 by switching circuits 5, 25 in a normal state. When the master station 1 controls the processing operation of the slave station 2, a switch 6 changes over the switching circuit 5 to connect a control logic circuit 7 to a line 18. Then the control logic circuit 7 sends a carrier signal to switch the switching circuit 25 in the slave station 2 and the control logic circuit 27 switches the switching circuit 25. Moreover, a monitor logic circuit 10 in the master station 1 is always connected to a monitor logic circuit 20, the slave station 2 outputs a monitor signal 21 to obtain a monitor signal 11 in the master station 1. That is, the control signal and the maintenance telephone signal use one frequency band in common and the frequency band of the monitor signal is made independent to allow the master station to supervise the slave station at all times.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP21405887A JPS6457895A (en) | 1987-08-27 | 1987-08-27 | Supervisory and control system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP21405887A JPS6457895A (en) | 1987-08-27 | 1987-08-27 | Supervisory and control system |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6457895A true JPS6457895A (en) | 1989-03-06 |
Family
ID=16649564
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP21405887A Pending JPS6457895A (en) | 1987-08-27 | 1987-08-27 | Supervisory and control system |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6457895A (en) |
-
1987
- 1987-08-27 JP JP21405887A patent/JPS6457895A/en active Pending
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